阅读说明：本技术 一种碎石桩机桩头专用装置及其使用方法 (Special device for pile head of stone-crushing pile machine and using method thereof ) 是由 肖新华 钟林峰 蒋书照 岳贵河 蒙国鑫 高鸿 向舟海 于 2020-06-12 设计创作，主要内容包括：本发明涉及一种碎石桩机桩头专用装置,包括桩头管、入土导入部、插销、叶板；在桩头管内侧设有挡板；入土导入部由多块活动板构成；其使用方法为：碎石桩机桩管下沉过程中,活动板合拢,叶板张开,桩管下沉到设计标高后,从桩顶倒入碎石,提升桩管,活动板张开,桩管振动,碎石通过桩头管进入地层,桩管提升到一定高度后,桩管再次下沉,进行反插,将碎石压入软基,此时活动板仍然张开,叶板合拢,叶板在挡板作用下,将碎石下压,将碎石密实并将碎石压人软土地基。本发明通过在桩头上安装尖头状的入土导入部以及叶板,不仅可轻易穿透较厚片石层,下沉到设计标高,而且还能够进行有效反插,保证了在顶面有片石层路段应用碎石桩进行软基处理的效果。(The invention relates to a special device for a pile head of a gravel pile machine, which comprises a pile head pipe, an in-soil lead-in part, a bolt and a blade plate, wherein the bolt is arranged on the pile head pipe; a baffle is arranged at the inner side of the pile head pipe; the soil-entering leading-in part is composed of a plurality of movable plates; the using method comprises the following steps: in the process of sinking the pile pipe of the gravel pile machine, the movable plate is folded, the blade plate is opened, after the pile pipe is sunk to the designed elevation, gravel is poured from the pile top, the pile pipe is lifted, the movable plate is opened, the pile pipe vibrates, the gravel enters the stratum through the pile head pipe, the pile pipe is lifted to a certain height, the pile pipe sinks again, reverse insertion is carried out, the gravel is pressed into a soft foundation, the movable plate is still opened at the moment, the blade plate is folded, the gravel is pressed down by the blade plate under the action of the baffle plate, the gravel is compacted, and the gravel is pressed into the soft foundation. According to the invention, the pointed soil-entering leading-in part and the blade plate are arranged on the pile head, so that the thick rubble layer can be easily penetrated and sunk to the designed elevation, effective reverse insertion can be carried out, and the effect of soft foundation treatment by applying the rubble pile on the road section with the rubble layer on the top surface is ensured.)

1. A special device for a pile head of a gravel pile machine is characterized by comprising a pile head pipe, an in-soil lead-in part, a bolt and a blade plate; the pile head pipe is a cylindrical steel pipe, the top of the cylindrical steel pipe is fixed at the bottom of the pile pipe of the gravel pile machine and is communicated with the pile pipe of the gravel pile machine; a plurality of baffles protruding out of the inner wall of the pile head pipe are uniformly arranged on the inner side of the pile head pipe; the soil-entering leading-in part is composed of a plurality of triangular movable plates which are hinged on the outer side of the bottom of the pile head pipe and can be freely opened and closed; the movable plate can rotate upwards to fold by taking the hinged position as a circle center under the action of upward external force and is mutually spliced with other movable plates to seal the bottom pipe orifice of the pile head pipe, and the movable plate can also rotate outwards to open by taking the hinged position as the circle center under the action of self gravity or downward external force to expose the bottom pipe orifice of the pile head pipe; the bolt is a shaft lever transversely fixed in the middle of the inner side of the pile head pipe; the blade plates are two semicircular plates which are arranged at two sides of the bolt inside the pile head pipe and are positioned below the baffle, the straight edges of the blade plates are hinged on the bolt, the arc-shaped edges of the blade plates can upwards rotate around the bolt as the circle center under the action of upward external force and lean against the bottom of the baffle, and the arc-shaped edges of the blade plates can downwards rotate around the bolt as the circle center under the action of downward external force or self gravity to enable the interior of the pile head pipe to be communicated.

2. The special device for the pile head of the stone crusher pile machine as claimed in claim 1, wherein the pile head pipe is integrally arranged at the bottom of the pile pipe of the stone crusher pile machine.

3. The special device for the pile head of the stone crusher pile machine as claimed in claim 1, wherein the number of the baffles is four, the upper surface of each baffle is an inclined surface, and the lower surface of each baffle is a plane.

4. The special device for the pile head of the stone crusher pile machine as claimed in any one of claims 1 to 3, wherein the soil-entering leading-in part is in a downward-protruding conical pointed structure after the movable plates are folded.

5. The special device for the pile head of the stone crusher pile machine as claimed in claim 4, wherein the outer side surface, the inner side surface and the bottom edge of the movable plate are arc-shaped surfaces.

6. The special device for the pile head of the stone crusher pile machine as claimed in claim 5, wherein the number of the movable plates is four.

7. The special device for the pile head of the stone crusher pile machine as claimed in claim 6, wherein the movable plate is made of high-strength steel plate.

8. The use method of the special device for the pile head of the stone crusher pile machine as claimed in any one of claims 1 to 7, characterized by comprising the following steps: in the process of sinking the pile pipe of the gravel pile machine, the movable plate is folded, the blade plate is opened, after the pile pipe is sunk to the designed elevation, gravel is poured from the pile top, the pile pipe is lifted, the movable plate is opened, the pile pipe vibrates, the gravel enters the stratum through the pile head pipe, the pile pipe is lifted to a certain height, the pile pipe sinks again, reverse insertion is carried out, the gravel is pressed into a soft foundation, the movable plate is still opened at the moment, the blade plate is folded, the gravel is pressed down by the blade plate under the action of the baffle plate, the gravel is compacted, and the gravel is pressed into the soft foundation.

Technical Field

The invention belongs to the technical field of civil engineering gravel piles, and particularly relates to a special device for a pile head of a gravel pile machine and a using method thereof.

Background

The gravel pile is a composite foundation reinforcing pile made of gravel (pebbles) as a main material. Gravel piles, sand piles and the like are generally called scattered piles or coarse-grained soil piles abroad. The discrete pile refers to a pile without bonding strength, and a composite foundation consisting of discrete piles such as gravel columns or sand piles and soil between piles can also be called a discrete pile composite foundation. At present, the composite foundations such as gravel piles, sand piles, slag soil piles and the like widely applied at home and abroad are discrete pile composite foundations.

The gravel pile is one kind of discrete pile, and can be divided into vibrating-impacting (wet) gravel pile and dry gravel pile according to the pile making process. The gravel pile manufactured by adopting the pile manufacturing process of vibration and water filling is called as a vibro-replacement gravel pile or a wet-method gravel pile. The gravel piles manufactured by various water-free flushing processes (such as dry vibration, vibration extrusion, hammering and the like) are collectively called dry gravel piles. When the pile is made of gravel, coarse sand, medium sand, round gravel, pebbles, crushed stones, etc. as fillers, it is called a gravel pile.

The bearing capacity of the gravel pile is large, the pile diameter and the pile length of the gravel pile can be adjusted according to different conditions of the soft foundation and different requirements of the bearing capacity of the foundation, the requirement of designing the bearing capacity of the foundation is met, and the gravel pile is widely applied to the soft foundation treatment of highway and construction projects. Because the reverse insertion construction process in the construction process of the gravel pile is very important for the pile forming quality of the gravel pile, the pile head of the gravel pile machine is generally flat, and the reverse insertion effect of the pile pipe in the construction process is improved. However, if the soft foundation top layer is filled with a thick rubble layer for the reasons of construction sidewalk and the like, the rubble pile foundation pile pipe and the vibration motor are greatly damaged due to the large resistance of the rubble layer, the maintenance cost is high, the pile forming speed is low, and the pile pipe of the rubble pile machine can not even be vibrated to sink to the designed elevation under some conditions. If a pointed pile head is used, the reverse insertion effect is difficult to ensure.

Disclosure of Invention

In view of the above problems, an object of the present invention is to provide a special device for a pile head of a gravel pile machine and a method for using the same, wherein the device ensures the effect of soft foundation treatment by applying a gravel pile in a section with a gravel layer on the top surface by applying a tip and a gravel pile head of a gravel pile foundation capable of ensuring reverse insertion effect.

The purpose of the invention is realized by the following technical scheme:

a special device for a pile head of a gravel pile machine comprises a pile head pipe, an earth-entering leading-in part, a bolt and a blade plate; the pile head pipe is a cylindrical steel pipe, the top of the cylindrical steel pipe is fixed at the bottom of the pile pipe of the gravel pile machine and is communicated with the pile pipe of the gravel pile machine; a plurality of baffles protruding out of the inner wall of the pile head pipe are uniformly arranged on the inner side of the pile head pipe; the soil-entering leading-in part is composed of a plurality of triangular movable plates which are hinged on the outer side of the bottom of the pile head pipe and can be freely opened and closed; the movable plate can rotate upwards to fold by taking the hinged position as a circle center under the action of upward external force and is mutually spliced with other movable plates to seal the bottom pipe orifice of the pile head pipe, and the movable plate can also rotate outwards to open by taking the hinged position as the circle center under the action of self gravity or downward external force to expose the bottom pipe orifice of the pile head pipe; the bolt is a shaft lever transversely fixed in the middle of the inner side of the pile head pipe; the blade plates are two semicircular plates which are arranged at two sides of the bolt inside the pile head pipe and are positioned below the baffle, the straight edges of the blade plates are hinged on the bolt, the arc-shaped edges of the blade plates can upwards rotate around the bolt as the circle center under the action of upward external force and lean against the bottom of the baffle, and the arc-shaped edges of the blade plates can downwards rotate around the bolt as the circle center under the action of downward external force or self gravity to enable the interior of the pile head pipe to be communicated.

Further, the pile head pipe is integrally arranged at the bottom of the pile pipe of the gravel pile machine.

Furthermore, the number of the baffles is four, the upper surface of each baffle is an inclined plane so as to facilitate the sliding of broken stones, and the lower surface of each baffle is a plane so as to facilitate the blocking.

Furthermore, the soil-entering leading-in part is of a downward-protruding conical pointed-end structure after the movable plates are folded, and the pile head can easily penetrate through the thick stone layer and sink to the designed elevation under the structure.

Further, the outer side face, the inner side face and the bottom edge of the movable plate are arc-shaped faces.

Further, the number of the movable plates is four.

Further, the movable plate is made of a high-strength steel plate.

A method for using a special device for a pile head of a stone pile machine comprises the following steps: in the process of sinking the pile pipe of the gravel pile machine, the movable plate is folded, the blade plate is opened, after the pile pipe is sunk to the designed elevation, gravel is poured from the pile top, the pile pipe is lifted, the movable plate is opened, the pile pipe vibrates, the gravel enters the stratum through the pile head pipe, the pile pipe is lifted to a certain height, the pile pipe sinks again, reverse insertion is carried out, the gravel is pressed into a soft foundation, the movable plate is still opened at the moment, the blade plate is folded, the gravel is pressed down by the blade plate under the action of the baffle plate, the gravel is compacted, and the gravel is pressed into the soft foundation.

The invention has the advantages that:

the invention has simple structure and obvious effect, is mainly applied to the soft soil foundation filled with a thicker rubble layer, the flat-headed pile pipe cannot sink or is difficult to sink, and the soft soil foundation of the gravel pile with poor reverse insertion effect can sink through the pointed-end pile pipe; through the leading-in portion and the lamina of burying of installation cusp form on the pile head, not only can pierce through thick lamella layer easily, sink to the design elevation, but also can effectively anti-insert, guaranteed to have the effect that the rubble pile carries out soft base processing in the lamella layer highway section of top surface application.

Drawings

The present invention will be described in further detail with reference to the accompanying drawings.

FIG. 1 is a schematic structural view of a soil-entering leading-in part of a special device for a pile head of a gravel pile machine, which is closed under the action of an upward external force;

FIG. 2 is a full sectional view of FIG. 1;

FIG. 3 is an assembly diagram of a blade plate and a bolt in the special device for a pile head of a stone-crushing pile machine of the invention;

shown in the figure: 1-pile head pipe, 2-baffle, 3-soil-entering leading-in part, 4-movable plate, 5-bolt and 6-blade.

Detailed Description

The following description of the embodiments of the present invention is provided for illustrative purposes, and other advantages and effects of the present invention will become apparent to those skilled in the art from the present disclosure.

It should be understood that the structures, proportions, and dimensions shown in the drawings and described herein are for illustrative purposes only and are not intended to limit the scope of the present invention, which is defined by the claims, but rather by the claims. In addition, the terms such as "upper", "lower", "left", "right" and "middle" used in the present specification are for convenience of description only, and are not intended to limit the scope of the present invention, and changes or modifications of the relative relationship thereof may be regarded as the scope of the present invention without substantial changes in the technical contents.

As shown in fig. 1-3, the special device for the pile head of the stone crusher pile machine comprises a pile head pipe 1, an earth-entering leading-in part 3, a bolt 5 and a blade plate 6; the pile head pipe 1 is a cylindrical steel pipe, the top of which is fixed at the bottom of the pile pipe of the gravel pile machine and is communicated with the pile pipe of the gravel pile machine; a plurality of baffles 2 protruding out of the inner wall of the pile head pipe 1 are uniformly arranged on the inner side of the pile head pipe 1; the soil-entering leading-in part 3 is composed of a plurality of triangular movable plates 4 which are hinged on the outer side of the bottom of the pile head pipe 1 and can be freely opened and closed; the movable plate 4 can rotate upwards to fold with the hinged position (with the pile head pipe 1) as a circle center under the action of upward external force and is mutually spliced with other movable plates 4 to seal the bottom pipe orifice of the pile head pipe 1, and the movable plate 4 can also rotate outwards to open and expose the bottom pipe orifice of the pile head pipe 1 with the hinged position (with the pile head pipe 1) as the circle center under the action of self gravity or downward external force; the bolt 5 is a shaft lever transversely fixed in the middle of the inner side of the pile head pipe 1; the blade plates 6 are two semicircular plates which are provided with two sides of the bolt 5 inside the pile head pipe 1 and are positioned below the baffle 2, straight edges of the blade plates 6 are hinged on the bolt 5, arc-shaped edges of the blade plates 6 can upwards rotate to abut against the bottom of the baffle 2 (seal the pile head pipe 1) by taking the bolt 5 as a circle center under the action of upward external force, and the arc-shaped edges of the blade plates 6 can also downwards rotate to enable the interior of the pile head pipe 1 to be communicated by taking the bolt 5 as the circle center under the action of downward external force or self gravity.

Further, pile head pipe 1 an organic whole sets up in rubble stake machine pile tube bottom (rubble stake machine pile pipe and pile head pipe 1 are an organic whole piece).

Furthermore, the soil-entering leading-in part 3 is in a downward-protruding conical pointed structure after the movable plate 4 is folded, and the pile head can easily penetrate through a thick stone layer and sink to the designed elevation.

Further, the outer side surface, the inner side surface and the bottom edge of the movable plate 4 are arc-shaped surfaces.

Further, the number of the movable plates 4 is four.

Further, the movable plate 4 is made of a high-strength steel plate.

In an initial state, four high-strength steel movable plates 4 on an earth-entering leading-in part 3 at the bottom of a pile pipe of the gravel pile machine are opened downwards under the action of self gravity, and two blade plates 6 are also opened downwards under the action of self gravity.

The pile tube of the gravel pile machine moves downwards to enable the soil-entering leading-in part 3 to be in contact with a soil layer or a stone layer, then the gravel pile machine further sinks into the soil layer or the stone layer, the four movable plates 4 of the soil-entering leading-in part 3 rotate upwards to be folded under the extrusion of the soil layer or the stone layer (the pile tube of the gravel pile machine sinks, the four high-strength steel movable plates 4 are upwards jacked up under the action of the reaction force of the soil layer or the stone layer until being folded), a pointed end is formed, the pile tube of the gravel pile machine continuously vibrates to be pressed downwards, and the pile tube of the gravel pile machine can easily penetrate through the soil layer or the stone layer (particularly the stone layer) under the assistance of.

In the sinking process of the pile tube of the gravel pile machine, the four high-strength steel movable plates 4 are always supported and folded by upward external force (because the pressure applied to the soil layer or the stone layer by the pile tube of the gravel pile machine always exists, the four high-strength steel movable plates 4 are always subjected to upward reaction force of the soil layer or the stone layer in the process, and even if the pile tube of the gravel pile machine stops sinking, the soil layer or the stone layer still can give upward reaction force to the movable plates 4 and the movable plates still can be supported and folded by the gravity action of the movable plates 4 and the pile tube of the gravel pile machine due to the fact that the four high-strength steel movable plates 4 in the folded state are still in the contact state with the soil layer or the stone layer.

After the pile pipe of the gravel pile machine sinks to the designed elevation, gravel is poured into the top of the pile pipe of the gravel pile machine, then the pile pipe of the gravel pile machine is lifted continuously, the bottoms of four movable plates 4 at the bottom of the pile head pipe are separated from a soil layer or a stone layer, the four movable plates 4 are opened outwards under the action of self gravity and the gravity of the gravel in the pile pipe and the pile head pipe 1 of the gravel pile machine, the pile pipe of the gravel pile machine vibrates, the gravel in the pile pipe of the gravel pile machine enters the stratum (in a hole formed by sinking the pile pipe of the gravel pile machine) through the pile head pipe 1, the pile pipe of the gravel pile machine is lifted to a certain height (at the moment, all the gravel in the pile pipe of the gravel pile machine basically falls into the ground from the pile pipe and the pile head pipe 1 of the gravel pile machine. Before reverse insertion, the four movable plates at the bottom of the pile head pipe 1 are in an open state under the action of self gravity, when the pile pipe of the gravel pile machine sinks again, the four movable plates 4 at the bottom of the pile head pipe 1 are firstly contacted with gravel, the four movable plates 4 are easily inserted into the gravel due to good gravel fluidity when moving downwards, the four movable plates are difficult to jack up and fold the four movable plates 4 due to the reaction force applied to the four movable plates, the gravel falling from a high position naturally forms a conical pile body, the gravel instead enters the pile head pipe 1 from the middle of the four movable plates 4 and is filled inside the four movable plates 4, so that the four movable plates 4 are difficult to fold, and in the reverse insertion process, the four movable plates 4 are still in the open state. The rubble gets into pile head pipe 1 inside back from four fly leafs 4 middle parts, just be located two leaf plates 6 below, further deepening along with reverse insertion, the rubble that gets into pile head pipe 1 inside increases, the rubble will withstand two leaf plates 6 that freely open and shut upwards rotates gradually, lean on in baffle 2 bottom (two leaf plates 6 are in a straight line basically this moment, with pile head pipe 1 inside seal) until 6 arc limits of leaf plate top, baffle 2 receives behind the ascending effort of leaf plate 6 (the effort that makes progress that the leaf plate 6 applyed for baffle 2 comes from the rubble), give 6 counter-acting forces of leaf plate, under this counter-acting force effect, leaf plate 6 pushes down the rubble, and then with the rubble closely knit and press people's ground with the rubble.

It is to be noted that the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.

The scope of the present invention is not limited to the technical solutions disclosed in the embodiments, and any modifications, equivalent substitutions, improvements, etc. made to the above embodiments according to the technical spirit of the present invention fall within the scope of the present invention.